I know this is out of the remit of you guys, and I appreciate all the help you always give. Now one of my large customers has no threatened to leave.
KRs

Lee

Edit: I have a failover IP on the server, is is possible to only send yahoo out through that?

Code:

Hi Lee,
Thank you for contacting Yahoo Mail.
This error message indicates that your email wasn't accepted because there's a Web address in the message body or message headers that Yahoo Mail will not accept for policy reasons. For instance, it's against Yahoo Mail's policy to send messages with links to viruses or other types of malicious software.
If you're the administrator for the website address content below, we ask that you review the material located within the Web address for potentially objectionable content. Please know that Yahoo is unable to disclose specific information regarding our filtering practices.
We thank you for your understanding in this matter.
Regards,
Frank
Yahoo Customer Care
http://help.yahoo.com
--------------- Original Message ---------------
From: [[email protected]]
Sent: 4/13/2016 9:27 AM
To:
Subject: Re: Postmaster basics : New sender requesting IP review (Case: 19900768) []
Hi Frank
I am trying to send you the inforamtion, but its not being that sucsessful
Heres to see if Pastebin works.
Yahoo - Pastebin.com
Thank you for contacting Yahoo Mail.
If the content of a message you're trying to send violates Yahoo Mail policies, you'll receive an SMTP error or bounce message containing "554 Message not allowed - [PH01] Email not accepted for policy reasons [120]." (For example, it's against Yahoo Mail policy to send phishing attempts.)
If you believe you shouldn't have received this type of error, we can investigate further but will need additional information from you.
Please respond to this email by copying and pasting the following in your response:
[LIST]
[*]The full Internet headers of the email that caused the error. We'll need full header information in order to investigate this further.
[LIST]
[*]Header information for the Mailer DAEMON or the message that was successfully sent to Yahoo will not be helpful in our investigation.
[/LIST]
[*]All parts of the message in plain text
[LIST]
[*]Message body - The contents of the email causing the error.
[*]Links - If there are any links embedded in the message body as HTML, we'll need them sent as plain text.
[*]Full headers - Make sure there aren't any HTML links in the text of the full headers you're providing.
[/LIST]
[/LIST]
Yahoo takes delivery issues very seriously. However, we won't be able to investigate the error you're seeing without the information above.
Regards,
Frank
Yahoo Customer Care
http://help.yahoo.com
--------------- Original Message ---------------
From: Yahoo! [[email protected]]
Sent: 4/11/2016 3:19 AM
To: [email protected]
Subject: Postmaster basics : New sender requesting IP review
This is an automated response confirming your recent request for assistance.
Your Case Number is: 19900768
Please don’t reply to this email, as this email address is used for outgoing email, only.
[LIST]
[*]
[/LIST]
If you submitted a support request, a Yahoo Customer Care representative will respond as soon possible.
[LIST]
[*]
[/LIST]
If you submitted an abuse report, thank you! A Yahoo Customer Care representative will investigate your report and take appropriate action. We’ll only contact you if further information is needed.
Sincerely,
Yahoo Customer Care

In this case, only the yahoo support can help you. If they are not willing to do that, then I dont see a way to investigate that any further as thats their internal filter that has a false positive here.

Yahoo is extremely difficult to deal with. If you're certain that no spam is coming from your server, you could have your IP whitelisted. It does cost money, but it's worth it. My IP migrated my server and assigned me an IP with a level 2 block. Whitelisting my IP was the only way to get out of the RBLs. In your case, Yahoo should honor the whitelist.

Tell me about it, the drivel that is displayed on my screen from their emails, would be humerous, if I wasn't so mad at them!
Do you have any sources I could start checking out for paid whitelisting services?
Thanks

I have not used a whitelisting service yet, so I cant give you any recommendations to this part. But maybe there is an alternative solution, have you considered to use a provider like sendgrid for outgoing emails (either all mails or just the ones for yahoo)? Sendgrid has a minimal free plan, so maybe it?s worth a try. https://sendgrid.com/partners/wordpress